CTS-BDZ1(Carpenter) - Stainless steel designed to provide uniform, fine carbide structure. Highly stain resistant, used for razor blades and other utility applications. Max working hardness around 60HRC. By specs it belongs to German W-Nr 1.4037 steel group, however unlike the 1.4037 spec CTS-BDZ1 contains trace amounts of Molyubdenum, upto 0.75%. Not much, but it';s a strong carbide former and 0.75% is better then 0.